bool PNS_MEANDER_SKEW_PLACER::Start( const VECTOR2I& aP, PNS_ITEM* aStartItem )
{
VECTOR2I p;
if( !aStartItem || !aStartItem->OfKind( PNS_ITEM::SEGMENT ) )
{
Router()->SetFailureReason( _( "Please select a differential pair trace you want to tune." ) );
return false;
}
m_initialSegment = static_cast<PNS_SEGMENT*>( aStartItem );
p = m_initialSegment->Seg().NearestPoint( aP );
m_originLine = NULL;
m_currentNode = NULL;
m_currentStart = p;
m_world = Router()->GetWorld( )->Branch();
m_originLine = m_world->AssembleLine( m_initialSegment );
PNS_TOPOLOGY topo( m_world );
m_tunedPath = topo.AssembleTrivialPath( m_initialSegment );
if( !topo.AssembleDiffPair ( m_initialSegment, m_originPair ) )
{
Router()->SetFailureReason( _( "Unable to find complementary differential pair "
"net for skew tuning. Make sure the names of the nets belonging "
"to a differential pair end with either _N/_P or +/-." ) );
return false;
}
if( m_originPair.Gap() < 0 )
m_originPair.SetGap( Router()->Sizes().DiffPairGap() );
if( !m_originPair.PLine().SegmentCount() ||
!m_originPair.NLine().SegmentCount() )
return false;
m_tunedPathP = topo.AssembleTrivialPath( m_originPair.PLine().GetLink( 0 ) );
m_tunedPathN = topo.AssembleTrivialPath( m_originPair.NLine().GetLink( 0 ) );
m_world->Remove( m_originLine );
m_currentWidth = m_originLine->Width( );
m_currentEnd = VECTOR2I( 0, 0 );
if ( m_originPair.PLine().Net () == m_originLine->Net() )
m_coupledLength = itemsetLength( m_tunedPathN );
else
m_coupledLength = itemsetLength( m_tunedPathP );
return true;
}
int PNS_MEANDER_SKEW_PLACER::origPathLength( ) const
{
return itemsetLength ( m_tunedPath );
}
